LSRK#
- class astropy.coordinates.LSRK(*args, copy=True, representation_type=None, differential_type=None, **kwargs)[source]#
Bases:
BaseRADecFrameA frame in the Kinematic Local Standard of Rest (LSR).
Conceptually the kinematic LSR is a frame where the average motion of the stars in the solar neighborhood is zero. In practice, the observed average motion is different for different spectral types, which has historically justified using convenient rounded values for the solar motion relative to the LSR. This LSRK frame uses the definition from
Gordon 1975, Methods of Experimental Physics: Volume 12: Astrophysics, Part C: Radio Observations - Section 6.1.5.
meaning the solar motion is 20 km/s towards RA=270 Dec=30 (B1900). The frame is axis-aligned and co-spatial with
ICRS.Attributes Summary
Default representation for differential data (e.g., velocity)
Default representation for position data
Mapping for frame-specific component names
Attributes Documentation
- default_differential#
Default representation for differential data (e.g., velocity)
- default_representation#
Default representation for position data
- frame_attributes = {}#
- frame_specific_representation_info#
Mapping for frame-specific component names
- name = 'lsrk'#